Ahospital performs 3 types of operations. the first type takes 30 minutes, and they charge $500 for it. the second type takes 1 hour, and they charge $750 for it. the third operation takes 2 hours, and they charge $1000 for it. the hospital can schedule up to 35 total operations per day. moreover, they have 2 operating rooms, each of which can be used for 10 hours per day. determine how many of each type of operation the hospital would perform to maximize its revenue. number of 30 minute operations: number of 1 hour operations: number of 2 hours operations: